segmentation fault using c++ copy instead of memcpy -

i'm using c++ copy algorithm copy string literal, (instead of memcpy) i'm getting segmentation fault don't know why though. here code:

#include <iostream> #include <cstring> #include <stdio.h>  using namespace std;  int main(int argc, char *argv[]) {      // if using copy regular pointers, there      // no need output iterator, ex:     char* some_string = "this long string\n";     size_t some_string_len = strlen(some_string) + 1;      char* str_copy = new char(some_string_len);     copy( some_string, some_string + some_string_len, str_copy);     printf("%s", str_copy);      delete str_copy;     return 0; } 

fix :

char* str_copy = new char[some_string_len];                          ^ notice square bracket 

free memory using :

delete [] str_copy;